kairiribai

Bingham: Hiram Bingham, A Gilbertese-English Dictionary (1908, 1953). American Board of Commissioners for Foreign Missions.
Sabatier: Ernest Sabatier, M.S.C., Dictionnaire Gilbertin-Français (1954), translated by Sr. M. Oliva as Gilbertese-English Dictionary (1971). South Pacific Commission Publications Bureau.

Bingham

kairíribai

n. an enemy, a mutual enemy.

vi. to be at mutual enmity.

kairiribai

n. enmity, rancour, spite, hostility, hate.
an enemy, antagonist.

v. kairiribai, kakairiribai: to detest, to hate, to be enemies, to be hostile.
i kairiribai: to hate each other.